While doing some image processing I am also trying to detect QR codes from
an image buffer.
The following code works just fine
func captureOutput(_ captureOutput: AVCaptureOutput,
didOutputSampleBuffer sampleBuffer: CMSampleBuffer, from connection:
AVCaptureConnection) {
if !CMSampleBufferIsValid(sampleBuffer) {
return
}
let pixelBuffer = CMSampleBufferGetImageBuffer(sampleBuffer)! as
CVPixelBuffer
var image = CIImage(cvPixelBuffer: pixelBuffer)
...
let qrFeatures = qrDetector?.features(in: CIImage(cvImageBuffer:
pixelBuffer))
print("qr", qrFeatures ?? "nil")
if let previewView = self.previewView {
previewView.image = image
}
}
but the QR code detector is producing a warning and spamming the console.
Finalizing CVPixelBuffer 0x17412f500 while lock count is 1.
qr []
Finalizing CVPixelBuffer 0x17012ed80 while lock count is 1.
qr []
Finalizing CVPixelBuffer 0x17012ed80 while lock count is 1.
qr []
>From this stackoverflow post it sounds like that's a iOS10 bug.
http://stackoverflow.com/questions/35956538/how-to-read-qr-code-from-static-image/35957461
Has anyone come across this before?
It sounds like an imbalance
of CVPixelBufferLockBaseAddress/CVPixelBufferUnlockBaseAddress calls. But
calling CVPixelBufferUnlockBaseAddress myself didn't help either.
Any thoughts on fixing this?
cheers,
Torsten
_______________________________________________
Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)
Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com
Help/Unsubscribe/Update your Subscription:
https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com
This email sent to arch...@mail-archive.com
